Ball bearing use:

The purpose of the ball bearing is to determine the relative position of two parts (usually the shaft and the bearing seat) and ensure their free rotation, while transmitting the load between them. At high speeds (eg in gyro ball bearings), this

use can be expanded to include free rotation with little wear in the bearings. In order to achieve this state, an adhesive fluid film called an elastic hydrodynamic lubrication film can be used to separate the two parts of the bearing. Denhard (1966) pointed out that the elasticity can be maintained not only when the bearing bears the load on the shaft, but also when the bearing is preloaded so that the positioning accuracy and stability of the shaft do not exceed 1 microinch or 1 nanoinch Hydrodynamic lubrication film.

Ball bearings are used in various machines and equipment with rotating parts.

Designers often have to decide whether ball bearings or fluid film bearings should be used in specific applications. The following characteristics make ball bearings more desirable than fluid film bearings in many applications.

① The starting friction is small and the working friction is suitable.

② Can withstand combined radial and axial loads.

③ Not sensitive to interruption of lubrication.

④ No self-excited instability.

⑤ Low temperature start is easy.

Within a reasonable range, changing the load, speed and operating temperature has only a small effect on the good performance of the ball bearing.

http://www.ghballbearing.com/